1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300fc4497ddf1ba49ad473f275e3a6bac262f312a48fd306358626c5d38aeb17. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/465a083c-4b24-4d99-a798-b320bf5dd0e1.json and https://artists.proofprofile.net/proofs/artist/465a083c-4b24-4d99-a798-b320bf5dd0e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b07ded03927a24761996b0dc2c630768b57fe88c60873645eb99db5c1f06ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683fdb7e1127e1469b320f6b877fed74433767e3a9cde57a7b66d48331f82b8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7524563b27627031a3b23bc78383862121c2c93f1236fb133d3ca7d2e12f34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdada9aa5e9f2b58474aaf46e80e34a1b8da87c4e914f80365656392ab2415468. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87395a4bec6003cbeeee57a0ce258211092f53dd4cfee24d7c798666b44fbbf. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46e9d9d2a45c0c6033c59b2adfeb7d1e62a772823d3bc664d1f6ef8c2972f2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c2b0c72c0391d82a70aec2538ca488e95ca7a61cbcce2c6d9568a9d4c66373. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad9dd96af6f8d48e9f28d65caf13c3a9439eee8559de09d9446203d836e3997. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220f8d85414184fe8f3ed597264ad9ac254fd326bdb9895ea90c7804ea65ff9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2abac4c8102babf801b633805f7c6aebadca937e3d7a054e096ab9614929e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5530260b82d8aa2b493c21915be300c3aa9dd3de4a6812e0384bcbe15d767465. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5f1de5578339f6701c92bd384519b5b3cd717f99f205c79ab5869a42b69b2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1624826194f91aeea8ea557d2826ae60b0eda4e2e29f2c5a547da577cbc3c737. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7496a33859c6a20ab3600f4d5449a1eff8d32cec9a30e7037e9eee9952cae8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1376b1c5ec04ad140ed171494ed5300cb841da4ef26928d8e04d8fe1a69c7c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7857f90b88823a1af5907a0d350d61d405e3439114b4d390761462d41dc641. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bdbb960b2a93d0cbf8a081ce988ecfa1cd55f2befcb51af3f5d84a90d2264. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872410091af5e73d8796973f6f8436a13efce320a63c134dc850ae4c51605ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a2bebf68bc4bfa95e676da0091ef0e9fcf111140fb39683054cdba20df439. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96361479de80fb064f6188a70d47617d58cde6e1715997c17acabe4a7b3a5948. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ee6dcc61e2fb9fa502cd021954b86d00119f2ab74e4069233d67e9f1b6943. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90200597a8022dded0bacd29162e77acd5acc71e2f8380378bad70b1797abda8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30f2c71d9fe7dc4905edd30bb843651a28b10c9a335059181e6a46050ce973. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649bb2a278565d92433320ef5346e0d5dc590017378a840466c9cb4046bac893. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32699e371aa8c6f3359119ceb1c635b11f0e920ed1f81f453fff8c2e1ccdf9e4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f3c2917dd75682a53350281c2f3a08b547995cf86af30937bd64aeb422c0b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204842ba9956574e41aeddc6a57a0324ebfa670cb9dc01ed892813f44a5029d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbec1371192c70e8a89cebc674ea29907fad426d80f04e6718c46d2a9ab8f79. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb6c439ed420e9a2645aaab0f1735e411599eb4c21c881cbf9d22556c3ebe2f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa010a47ade9ab1a43e11f0c640adf0e5246c89be7883b135183a05a485567ec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a27ca75736e9c05564ba260400af17d166af909d810b6c67d523b2533718c8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0c51eef6481a26d288925302160936b454551cec606015d6b6759becf899e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3262717a7c1b4155b3a14b7cf641b8b938b3ef99f7aee80b767509978dbfc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0894413c38af25db72abad06be360108c97a45ebf485934d1497fe476e5e5cb4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0199057121e7f8e769d3d710790768131014475e4cd1b71a69b202377e2b4d00. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3111360e7780a37d59f91984b7ea9dc8f5fdbaa5bcd5df70fdba4f221c42d5b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464518a97ddb5d9bd6756fc19f643e2f1d6a06862c48d76e1b33153a7d3b2fcc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef9f430b01185375e7cdb5d02725ffabfe2ccdd115e6e06f51e6bad2353ad4a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2324577.